805
FXUS65 KBYZ 171909
AFDBYZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
109 PM MDT MON AUG 17 2026
KEY MESSAGES
- MARGINAL RISK FOR SEVERE STORMS FOR MUCH OF THE REGION TODAY;
STRONG WINDS >60 MPH ARE THE PRIMARY THREAT.
- SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED TUESDAY. DRIER
CONDITIONS WEDNESDAY AND THURSDAY.
- SEASONAL TEMPS IN THE 80S THROUGH MOST MIDWEEK, PUSHING INTO THE
LOWER 90S BY LATE WEEK. INCREASING PRECIPITATION CHANCES FRIDAY
THROUGH THE WEEKEND.
DISCUSSION
TODAY THROUGH MONDAY...
SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS SOUTHEAST MONTANA
TODAY AND TUESDAY. SHOWERS AND THUNDERSTORMS WILL GET STARTED THIS
AFTERNOON OVER THE WESTERN HIGH TERRAIN AND MOVE TO THE EAST
THROUGHOUT THE EVENING BEFORE COMING TO AN END BY MIDNIGHT.
ISOLATED SEVERE STORMS WILL BRING THE THREAT FOR WIND GUSTS IN
EXCESS OF 60 MPH. TUESDAY WILL ALSO SEE SHOWERS AND THUNDERSTORMS
DEVELOP IN THE AFTERNOON WITH SHOWERS LASTING THROUGH THE
OVERNIGHT TILL AROUND 6 AM WEDNESDAY. TEMPERATURES TUESDAY WILL BE
A COUPLE OF DEGREES COOLER THAN TODAY WITH TEMPERATURES IN THE
80S F.
ENSEMBLE SYSTEMS ARE IN GOOD AGREEMENT THAT UPPER-LEVEL
RIDGING WILL BEGIN TO BUILD OVER THE REGION WEDNESDAY THROUGH
SATURDAY. THIS WILL CAUSE TEMPERATURES TO INCREASE INTO THE 90S F
FOR MOST LOCATIONS THURSDAY THROUGH SATURDAY. STARTING FRIDAY,
UPPER-LEVEL RIDGING WILL ALLOW SOUTHWEST MOISTURE TO ADVECT INTO
THE REGION BRINGING A MONSOON PATTERN. THIS WILL ACT TO INCREASE
PRECIPITATION CHANCES THROUGH THE WEEKEND. EARLY NEXT WEEK, ABOVE
AVERAGE UPPER-LEVEL HEIGHTS REMAIN BUT UPPER-LEVEL RIDGING WEAKENS
TAKING A FEW DEGREES OFF TEMPERATURES. TORGERSON
AVIATION
SCATTERED SHOWERS AND THUNDERSTORMS ARE STILL EXPECTED TO FORM OFF
THE HIGHER TERRAIN THIS AFTERNOON AND INTO THE EVENING. MAIN
THREAT WITH THESE STORMS WILL BE STRONG WINDS GUSTING 40-50KTS.
SEE TIMING FOR THUNDERSTORMS TODAY BELOW. ANOTHER ROUND OF
SCATTERED SHOWERS AND THUNDERSTORMS MOVES THROUGH TUESDAY
AFTERNOON WITH A FEW STRONGER STORMS POSSIBLE.
KLVM: 21-04Z
KBIL: 22-05Z
KMLS: 00-04Z
KSHR: 21-05Z
TS
PRELIMINARY POINT TEMP/POPS
TUE WED THU FRI SAT SUN MON
-----------------------------------------------------------
BIL 059/084 059/089 060/092 062/089 065/090 064/088 062/086
23/T 30/U 00/U 00/B 12/W 42/W 31/U
LVM 050/084 047/086 050/091 054/089 055/088 053/086 051/084
32/T 20/U 00/U 00/U 34/T 53/T 32/T
HDN 056/087 054/090 055/093 058/091 062/093 061/090 059/089
21/B 20/U 00/U 00/U 11/B 31/B 31/U
MLS 058/085 057/089 059/092 061/087 062/090 065/090 062/087
41/U 30/U 00/U 00/U 11/B 31/B 21/U
4BQ 060/085 057/088 059/092 061/089 064/090 065/090 063/088
31/B 31/U 00/U 00/U 11/B 32/T 31/U
BHK 053/084 053/088 055/091 056/087 055/086 059/089 058/089
40/U 31/U 00/U 00/U 01/B 32/T 22/W
SHR 054/082 051/086 051/090 056/089 059/090 059/088 055/085
24/T 51/U 00/U 00/U 12/T 23/T 22/T
BYZ WATCHES/WARNINGS/ADVISORIES
MT...NONE.
WY...NONE.
WEATHER.GOV/BILLINGS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page